I replaced my iPhone 4 Battery. During the replacement process I sort of ignited my OLD battery for a split second because I tried to pry it off with a mini screwdriver (anything plastic I used broke, the battery was REALLY glued on). Installed the new battery, but now it's been on charge for 5 hours and it's still showing me the "battery low" icon (it's plugged in). Note that it isn't showing me the "plug in to power / low battery" icon, just the "low battery" part, since it's already plugged in. Not sure what to do. My old battery is no longer usable and my new one is taking forever to charge.. should it take this long?